Leech genera

Tyrannobdella is a monotypic genus of leech, of family Praobdellidae, found in South America in the upper reaches of the Amazon. This newly found genus of leech takes sustenance from the mucous membranes of the mammalian upper respiratory tract, and is known to feed upon humans. It has eight teeth. Tyrannobdella rex was discovered feeding upon the mucous membrane of a girl who had recently bathed in the upper Amazon in Peru.

Erpobdella is a genus of leeches in the family Erpobdellidae. Members of the genus have three or four pairs of eyes, but never have true jaws, and are typically long. All members do not feed on blood, but instead are predators of small aquatic invertebrates, which they often swallow whole.

Haemadipsa is a genus of leeches, with members commonly known as jawed land leeches. These annelids are known from subtropical and tropical regions around the Indian and Pacific Ocean. Well-known Haemadipsa are for example the Indian Leech (Haemadipsa sylvestris) and the yamabiru or Japanese Mountain Leech (Haemadipsa zeylanica). Members of the genus feed on blood. They are troublesome to humans and animals especially because their bites result in prolonged bleeding.

Haementeria is a genus of leeches in the family Glossiphoniidae. The genus was described in 1849 by Filippo De Filippi.

Hirudo is a genus of leeches of the family Hirudinidae. It was described by Carl Linnaeus in his landmark 1758 10th edition of Systema Naturae.

genus of annelids

Placobdella is a genus of leeches in the family Glossiphoniidae. Species can grow up to 6.5 cm in length, have extremely close eyes and mouths located on the rim or near the anterior (front) sucker.

Haemopis is a genus of leeches belonging to the family Haemopidae. The species of this genus are found in Eurasia and Northern America.

Macrobdella is a genus of leeches native to freshwater ecosystems of North America, especially Canada, Mexico, and the United States. The genus is commonly referred to as North American medicinal leeches.

Theromyzon is a genus of leeches belonging to the family Glossiphoniidae. There are about 14 described species in Theromyzon.

Orobdella is a genus of leeches. It is the only genus in the monotypic family Orobdellidae. They are large annelids, with the largest species (Orobdella octonaria) exceeding in length, but some are much smaller: mature individuals of Orobdella koikei can measure only . They inhabit the banks of mountain streams and feed on earthworms. The majority of species are endemic to Japan; two species are known from Taiwan, one from Korea, and one from Russian Far East.

Pontobdella is a species of marine leeches with a cosmopolitan distribution. They are covered with tubercles and their primary hosts are rays, sharks, skates, and sawfish.

Batracobdella is a genus of Glossiphoniidae.

Myzobdella is a genus of leeches in the family Piscicolidae. The genus name derives from two Greek words: μυζω (I suck), and βδελλα (leech).

Hirudobdella is a genus of annelids belonging to the family Hirudinidae.

Philobdella is a genus of Nearctic leeches belonging to the family Macrobdellidae.